Your vessel is participating in the Voluntary Observing Ship Program. You are preparing WS Form B-80 as seen in illustration D041NG below. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff?

Question

Your vessel is participating in the Voluntary Observing Ship Program.  You are preparing WS Form B-80 as seen in illustration D041NG below. Three-quarters of the sky is covered with clouds, and the anemometer indicates that the apparent wind is from 226° relative at 17.7 knots. You are on course 020°T at 8 knots. How should you encode group Nddff?

Accepted Answer

Option C: 62324. Meteorological code group Nddff encodes cloud fraction (N=6 for 6/8ths or 3/4 sky cover), true wind direction rounded to the nearest 10 degrees (dd=23 for 226°), and wind speed in knots (ff=24 for 17.7 knots), following WMO meteorological observation standards.